本文以中国古代史学中的“三史”一词作为考察对象，详细探讨“三史”在汉唐之间的演变轨迹，全文共分四个部分：

第一部分意在阐明“三史”的历史渊源及其早期传播。“三史”一词虽然屡见于三国时期，但其概念萌芽可追溯至东汉中后期。而这一称呼的背后实际上是源于当时社会有意统合历史叙述的思想潮流，不仅汉朝政府为了加强自身统治，努力将《史记》《汉书》乃至《汉记》纳入到官方意志统辖之下，帝国士人也从自身学术背景出发，将这三部史籍作为一个集合体予以考察。经由文化精英的推动，“三史”在三国两晋时期开始成为衡量个人学养和史学才能的重要标准，但这一表相实际上忽视了“三史”内部的价值差异，也为“三史”重塑埋下了伏笔。

第二部分主要探讨“三史”在南北朝时期的内涵转型。一方面魏晋以来对“三史”极力推崇，促使其文化地位的抬升，“三史”在社会知识领域中经典化倾向日益显著。这一转变既与南北朝时期骈俪文风的盛行有关，又是魏晋以后经史分离作用的结果。另一方面，在“三史”地位日益尊崇的同时，其内部的价值差异也不断显著，诸家后汉书的出现使得《东观汉记》在知识图谱中的地位严重削弱，集诸家大成的范晔《后汉书》则潜移默化地改变着传统“三史”格局。

第三部分以隋唐时期“三史”的制度化为核心，探析“三史”内涵重塑。中唐以前，范晔《后汉书》与《东观汉记》交替出现在科举选官系统中，其根源在于二者私撰和官修的性质，与唐政府渴望吸收人才和管控史学的理念相龃龉。随着新兴士人政治参与的深化，范晔《后汉书》于唐后期成功跻身“三史科”，“三史”的新内涵也由此奠定。与此同时，符号化的“三史”依然广泛存在于各类文献中，这种持久的语言活力很大程度上是基于以“三统”“五行”为核心的历史哲学体系对中国古代历史文化的影响，“三史”的经典化进程也是这种数字崇拜的直接反映。

This thesis takes the term “Sanshi”(三史) in ancient Chinese historiography as the object of investigation, and discusses in detail the evolution track of “Sanshi” in different historical periods,which consists of four parts:

The first part aims to clarify the historical origin and early dissemination of “Sanshi”. Although the term “Sanshi” was frequently seen in the Three Kingdoms Period, its conception can be traced back to the middle and late Eastern Han Dynasty. And behind the name there was a kind of intellectual current of integrating the historical narration at that time. In order to strengthen its rule, the government of the Han Dynasty made efforts to bring Shiji, Hanshu and even Hanji(汉记) under its control.Meanwhile, the imperial scholars  studied these three historical records as a collection based on their own academic background. Under the promotion of cultural elites, “Sanshi” in the Three Kingdoms Period and Jin Dynasty began to become an important standard to measure personal education and historiography ability, but this appearance actually neglected the internal value differences of “Sanshi”, and foreshadowed the reconstruction of “Sanshi”.

The second part mainly demonstrates the connotation transformation of “Sanshi” in the period of North-South Period. On one hand, , the “Sanshi” was highly praised after the Wei-Jin Period, which promoted its cultural status, and the classicalization  of “Sanshi” became more and more obvious in the field of social knowledge. This change was not only related to the prevalence of the parallel style of writing in the North-South Period, but also the result of the separation of classics and history after the Wei-Jin Period. On the other hand, while the status of “Sanshi” was increasingly respected, the internal value differences were also increasingly heated up. The appearance of “HouHanshu”s seriously weakened the position of DongGuanHanJi in the knowledge graph. The HouHanshu by Fan Ye(范晔), a collection of the great achievement of various books, has subtly changed the pattern of the traditional “Sanshi”.